LINUXOPOLIS # 1,084

/dev/null        $ cat /dev/null > file.txt
/etc/passwd      $ cat /etc/passwd | cut -d: -f7 | sort | uniq -c | sort -nr
/etc/shells      $ cat /etc/shells
/proc/interrupts $ watch -d cat /proc/interrupts                             // interrupts
/proc/ioports    # cat /proc/ioports | less                                  // ioports

alias            $ alias ea='vim ~/.bash_aliases && source ~/.bash_aliases'
apropos          $ apropos password | less
apt              # apt install supertuxkart
arp-scan         # arp-scan --localnet | vim -

cat              $ cat > text.txt <<HERE
cups             # nc -z 127.0.0.1 631 && echo ok || echo failed
curl             $ curl cheat.sh/:list | less
curl             $ curl wttr.in

date             bash $ echo "It is now $(date +%T) on $(date +%A)"
date             fish $ echo It is now (date +%T) on (date +%A)
dpkg             $ dpkg --list
dpkg             $ dpkg --list| fzf

efibootmgr       # efibootmgr

firmware         # ls /sys/firmware/efi
free             # watch free -h

grub             # grub-install

history          $ history search --contains 'vim'
history          $ history | fzf

lsof             # lsof -u user | fzf
lsof             # lsof -u user | vim -
lspci            $ clear; lspci; echo; lspci -t; echo                        // pci
lsusb            $ clear; lsusb; echo; lsusb -t; echo                        // usb

mail             $ watch mail
memory           $ ps axch -o cmd:15,%mem --sort=-%mem | sed 10q
memtester        # memtester 7G
mkdir            # mkdir -p /mnt/ram; mount -t tmpfs tmpfs /mnt/ram -o size=8192M
mkdir            $ mkdir -p Backups/{Sales,Development,HR}/{Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec}/{Sun,Mon,Tue,Wed,Thu,Fri,Sat}
mkdir            $ mkdir -p dummy/{1..100}/{1..100}
mount            $ mount | column -t
mpg123           $ mpg123 -zvC /home/user/music/*

nc               # nc -z 127.0.0.1 631 && echo ok || echo failed             // cups
nc               # nc -z 127.0.0.1 80 && echo ok || echo failed              // apache
netstat          # netstat -tulpn
ntpq             $ watch ntpq -p

printenv         $ printenv | awk '/^PATH|HOME|USER|SHELL/ {print $0}'
processes        $ ps axch -o cmd:15,%cpu --sort=-%cpu | sed 10q

ranger           $ ranger /etc/
ranger           $ ranger /usr/share/doc/
ranger           $ ranger ~/.local/share/Trash/

scp              $ scp -r folder/ [email protected]:~
scp              $ scp file.txt [email protected]:/home/pi/
scp              $ scp [email protected]:/home/pi/file.txt . 
systemctl        # systemctl status|restart|start|stop|enable|disable
systemctl        $ systemctl status apache2

timedatectl      $ timedatectl
tuptime          $ tuptime -t                                                // table
tuptime          $ watch tuptime

usermod          # usermod -aG group1,group2,group3 username

vim              $ vim $(fzf --height 40%)
vim              $ vim $(fzf -e --preview 'head -100 {}')
vim              > export EDITOR=vim 
vim              > export VISUAL=vim 

watch            $ watch -d -n 5 ls -l
whatis           $ whatis passwd